This is a discussion on cat issues within the Clubwrx Website/Forum Support - Report Errors forums, part of the Community - Meet other Enthusiasts category; hi,
2005 wrx wagon with 150k on it, front cat is going bad setting of the chk engine light with ...

cat issues

hi,
2005 wrx wagon with 150k on it, front cat is going bad setting of the chk engine light with an o2 sensor read. if I punch out the front cat will the chk engine keep coming on? any performance issues? safety issues? fumes etc?
thx and hav a good one

You will always have the cell firing on if you have the bad cat (or no cat), unless you override it via tune (for example, when you go stage 2 on a COBB map with a high flow cat downpipe, the tune disables that cell).

I've got issues with my cat too, he's always running around the damn house at 4am like a fool!

Seriously though, on my old Honda I went catless to fool the ECU I welded a longer bung on it which backed the o2 sensor out of the exhaust stream so the ECU read a difference between the 1st and 2nd o2 sensor.

That was the Honda however, I'm not sure if it will work on a WRX. I don't see why it wouldn't.

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